Ammonites lived during the periods of Earth history known as the Jurassic and Cretaceous. Together, these represent a time interval of about 140 million years.
The Jurassic Period began about 201 million years ago, and the Cretaceous ended about 66 million years ago. The ammonites became extinct at the end of the Cretaceous Period, at roughly the same time as the dinosaurs disappeared.
However, we know a lot about them because they are commonly found as fossils, formed when the remains or traces of the animal became buried sediment that later solidified into rock.
▽ Unbacked, Natural
▽ Approximate Measurements
25mm x 20mm
28mm x 16mm
21mm x 14mm
20mm x 14mm
19mm x 14mm
20mm x 13mm
70.5 total carats
▽ Handcut in Arizona
<<Photos © Wylder Stones>> #068W
Please allow for a certain degree of weight/size up or down, as per measurements and weight taken via scale. We do our very best to measure as exact as possible for you as a buyer.